Adafruit HTU31 Temperature & Humidity Sensor Breakout Board - STEMMA QT / Qwiic

SKU: ADA4832 Brand: Adafruit

The HTU31-D is the third generation of temperature-humidity sensors from TE - and a great follow-up to the popular HTU21-D sensor. Like the HTU21, the '31 is great for sensing temperature and humidity, with excellent specifications.

$14.50 AUD, inc GST

$13.18 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Delivered by Tue, 7th of May

Quantity Discounts:

10-25 $12.65 (exc GST)
25+ $12.25 (exc GST)

This I2C digital humidity sensor is an accurate and intelligent alternative to the common DHT-series sensors, at about the same price! It has a typical accuracy of ±2% at 20% to 100% relative humidity, at a temperature range of 0 to 70°C. Operation outside this range is still possible - just the accuracy might drop a bit. The temperature output has an accuracy of ±0.2°C from -0~100°C, on par with the better quality on-chip sensors Adafruit have stocked.

The sensor also has an on-board heater that can be controlled on and off to help evaporate condensation on the sensing element. Of course, temperature sensing will not be accurate with the heater on. Data reads come with CRC, so you can be more confident of data that is read compared to other I2C sensors.

Other nice extras: a hardware reset pin, an address-select pin so you can have two on one I2C bus, and a thermal-isolation cut out so nearby circuitry has less effect on the readings.

To get you going fast, Adafruit spun up a custom made PCB in the STEMMA QT form factor, making them easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the HTU31Ds or to chain them with a wide range of other sensors and accessories using a compatible cable. QT Cable is not included, but Adafruit have a variety in the shop. You can use this sensor safely with any kind of microcontroller/microcomputer with 3.3V-5V power or logic.

Each order comes with one fully assembled and tested PCB breakout and a small piece of header. You'll need to solder the header onto the PCB to use in a breadboard but it's fairly easy and takes only a few minutes even for a beginner.

Technical Details

Uses I2C address 0x40 or 0x41
Product Dimensions: 25.5mm x 17.7mm x 4.6mm / 1.0" x 0.7" x 0.2"
Product Weight: 1.6g / 0.1oz

Product Comments

Start the conversation

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$6+ for Standard Post (typically 6+ business days, tracked)
$10+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

$11+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!